Abstract: The invention relates to an adaptive detection method and detector for detecting signal states of a received quantized signal using a set of reference vectors stored in a memory (11). According to the invention, the detector comprises sampling means (4) for sampling the received signal in a sliding time window; means (2) using a self-organizing map for calculating a first corrected set of reference vectors on the basis of the stored set of reference vectors used in the detection and samples of actual signal states received in the time window; means (3) employing the K-means method or the like for calculating a second corrected set of reference vectors on the basis of the first corrected set of reference vectors and the samples of the actual signal states; and means (9) for updating the set of reference vectors stored in the memory means (11) by the second corrected set of reference vectors.

Abstract: The invention relates to a method of producing a digital code sequence, particularly a note code sequence from a finite number of different code types, each representing one or more quantized properties of, for instance, a predetermined note, wherein new codes are generated one at a time after the code sequence on the basis of the existing codes of the sequence. The present invention utilizes rule propositions produced on the basis of mutual local equivalences between symbols occurring in an example material. A new code is attempted to be produced first on the basis of the code produced last and then more and more new codes are tested to find on the basis of them a rule proposition which unambiguously gives the code sequence of the new code.